138280779480 has 32 divisors (see below), whose sum is σ = 414842338800. Its totient is φ = 36874874496.

The previous prime is 138280779479. The next prime is 138280779541. The reversal of 138280779480 is 84977082831.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138280779480.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576169795 + ... + 576170034.

Almost surely, 2^138280779480 is an apocalyptic number.

138280779480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138280779480 is an abundant number, since it is smaller than the sum of its proper divisors (276561559320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138280779480 is a wasteful number, since it uses less digits than its factorization.

138280779480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152339843 (or 1152339839 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 138280779480 in words is "one hundred thirty-eight billion, two hundred eighty million, seven hundred seventy-nine thousand, four hundred eighty".